Fig. 4: Experimental data and our model.
a Thermal conductivity is divided by temperature as reported by Greywall17 (at zero pressure) and by Murphy and Meyer31 (at saturated vapor pressure). At very low temperatures (T ~ 0.01 K) in the Fermi liquid regime, κ/T ∝ T−2 (purple line). Above 0.5 K, κ/T ∝ T−1/2. The blue line represents what is expected by Eq. (4), using the effective mass and the carrier density of 3He. The red solid line represents a fit to the experimental data in the whole temperature range assuming that κ/T consists of the sum of T−1/2 (sound transmission) and T−2 term (quasi-particle transmission) terms. b Same data plotted for κ(T). The maximum discrepancy between data and theory is about 10%. Also shown are the two components of the total κ(T).
